/* Per-layer color styling */
.layer-bar { border-radius: var(--border-radius); padding: var(--space-md) var(--space-lg); cursor: pointer; transition: all var(--transition-fast); display: flex; align-items: center; justify-content: space-between; color: #fff; font-weight: var(--fw-semibold); }
.layer-bar:hover { transform: translateX(4px); box-shadow: var(--shadow-md); }

.layer-1-bg { background: var(--layer-1); }
.layer-2-bg { background: var(--layer-2); }
.layer-3-bg { background: var(--layer-3); color: #333; }
.layer-4-bg { background: var(--layer-4); }
.layer-5-bg { background: var(--layer-5); }
.layer-6-bg { background: var(--layer-6); }
.layer-7-bg { background: var(--layer-7); }

.layer-1-border { border-left: 4px solid var(--layer-1); }
.layer-2-border { border-left: 4px solid var(--layer-2); }
.layer-3-border { border-left: 4px solid var(--layer-3); }
.layer-4-border { border-left: 4px solid var(--layer-4); }
.layer-5-border { border-left: 4px solid var(--layer-5); }
.layer-6-border { border-left: 4px solid var(--layer-6); }
.layer-7-border { border-left: 4px solid var(--layer-7); }

.layer-1-text { color: var(--layer-1); }
.layer-2-text { color: var(--layer-2); }
.layer-3-text { color: var(--layer-3-dark); }
.layer-4-text { color: var(--layer-4); }
.layer-5-text { color: var(--layer-5); }
.layer-6-text { color: var(--layer-6); }
.layer-7-text { color: var(--layer-7); }

.layer-1-light-bg { background: var(--layer-1-light); }
.layer-2-light-bg { background: var(--layer-2-light); }
.layer-3-light-bg { background: var(--layer-3-light); }
.layer-4-light-bg { background: var(--layer-4-light); }
.layer-5-light-bg { background: var(--layer-5-light); }
.layer-6-light-bg { background: var(--layer-6-light); }
.layer-7-light-bg { background: var(--layer-7-light); }

/* Layer stack visualization */
.layer-stack {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.layer-stack-item {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--border-radius);
  color: #fff;
  font-weight: var(--fw-semibold);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.layer-stack-item:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
  z-index: 1;
}

.layer-stack-item.active {
  transform: scale(1.04);
  box-shadow: var(--shadow-lg);
  z-index: 2;
}

.layer-stack-item .layer-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
}

.layer-stack-item .layer-name {
  flex: 1;
  margin-left: var(--space-md);
}

.layer-stack-item .layer-pdu {
  font-size: var(--fs-xs);
  opacity: 0.8;
  font-weight: var(--fw-normal);
}

/* Layer detail card */
.layer-detail {
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.layer-detail-header {
  padding: var(--space-xl);
  color: #fff;
}

.layer-detail-header h2 {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-xs);
}

.layer-detail-header p {
  opacity: 0.9;
  font-size: var(--fs-sm);
}

.layer-detail-body {
  padding: var(--space-xl);
}

/* Comparison view */
.comparison-container {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.comparison-column {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.comparison-column h3 {
  text-align: center;
  margin-bottom: var(--space-md);
  font-size: var(--fs-lg);
}

.comparison-lines {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 60px;
  padding-top: 48px;
}

.comparison-line {
  width: 100%;
  height: 2px;
  background: var(--border-color);
  margin: 6px 0;
  transition: all var(--transition-fast);
}

.comparison-item {
  padding: var(--space-md);
  border-radius: var(--border-radius);
  text-align: center;
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.comparison-item:hover {
  border-color: currentColor;
}

.comparison-item.highlight {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
  border-color: currentColor;
}